Spring-bar attachment for flexible bracelets



Sept. 9, 1930.

c. B. GREENBERG 1,775,620

SPRING BAR ATTACHMENT FOR FLEXIBLE BRACELETS Filed Jan. 28, 1929 VIII'III'I [l1 nrles E1. Ere 5211:25 5

11v VENTOR WWW} A TTORNEY Patented Sept. 9, 1930 UNITED STATES CHARLES B. GREENBERG, on NEW YORK, 11'. Y.

. SPRING-BAR ATTACHMENT FOR FLEXIBLE BRACELETS Application filed January 28, 1929. Serial No. 335,493.

My invention relates to flexible bracelets and refers more particularly to the male spring bar attachment for the links of a flexible bracelet.

The object of my invention is to provide a simple, neat and attractive device that can be easily attached and detached from its cooperating parts.

I attain these results by the means illus-' trated in the accompanying drawings wherein similar numerals refer to like parts throughout the several views, in which Figure 1 is an assembly of the device.

Figure 2 is an end elevation of the device.

Figure 3 is a detail of the spring bar pin.

Figure 4 is a detail of the spring bar tube.

Figure 5 is anfassembly, partly in section of the spring bar.

Figure 6 is an isometric view of the bracelet link tube.

The device is made upof a spring bar unit and a bracelet tube which spring bar unit is commonly known as a male spring bar.

The bracelet link tube 1 is a tube circular at 2 and has a rectangular extension at 3 and is somewhat shorter than the spring bar unit which is adapted to be held within the circular part of this tube by friction and the rectangular extension may be connected to any other device such as 18 by means of extensions 19 and 20, which project into the rectangular opening 17.

The spring bar unit is comprised of a tube 4. one end 9f which is rounded and partly closed to provide a hole 6 and the other end bevelled at 7, so that when its inner parts are assembled, this end 7 may be rolled over and form a hole at 8, as shown in Figure 5 and hold the working parts therein.

Within this tube are two sprin bar pins 9 and 10, each comprised of a body portion 11 and a smaller extension 12, which'extension is adapted to slidably engage with the holes 6' and 8 and the spring 13 will force these pieces 9 and 10 against the partly closed ends of the tube 4.

In operation, the pins 9 and 10, providing pivots for that part 14 to which they may be attached, as shown by the dotted lines in Figure 1, may be forced inwardly so that they may be pivotally held by the bearings 15 and 16 of the part 14 and it is obvious.

that links or any other device may be easily attached to the rectangular part of the tube 1 in any suitable, way. 4

Having thus described and illustrated the preferred embodiment of my invention, I do not wish to limit myself to the exact construction or arrangement of parts shown, since it is evident that modifications may be made therein without departing from the spirit of the invention or scope of the claims.

I claim 1. In a male spring bar attachment, the combination with an inner tubewith partly closed ends slidably carrying two end pins anda spring adapted to press said pins apart and an outer tube of keyhole shape in cross section formed to fit; over said inner tube and having a rectangular side extension adapted-to hold any desirable device.

2. In a spring bar attachment for flexible bracelets, the combination of a tube of key hole shape in cross section providing an extension, the round part of said tube adapted to hold a male spring bar provided with two slidable pivots.

3. In a spring bar attachment for flexible bracelets the combination of a tube of key hole shape in cross section providing an extension, the round part of said tube adapted to hold a male spring bar comprised of a tube provided with two compressible pivots held therein between a spring means.

Signed at New York, in the county of New York and State of New York, this 20 day of December, 1928.

CHARLES B. GREENBERG. 

